Water is impaired due to one or more pollutants and associated quality impacts.

Notes

1980 trout streams list (class 2).
Little Willow Creek is approximately eight miles long, located in the southeast portion of Richland County Wisconsin. The Wisconsin Department of Natural Resources (WDNR) placed the entire length of Little Willow Creek on the state's 303(d) impaired waters list
in 1996 as high priority due to degraded habitat caused by excessive sedimentation (Table 1). The Clean Water Act and US EPA regulations require that each state develop
TMDLs for waters on the Section 303(d) list.
This water was assessed during the 2014 listing cycle; phosphorus sample data nearly exceeded (May Exceed) 2014 WisCALM listing thresholds for the Fish and Aquatic Life use, but biological sample data, macroinvertebrate or fish Index of Biotic Integrity (IBI), scored in the fair to excellent condition categories. Further monitoring is recommended.
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.

Assessments during the 2020 listing cycle showed new fish sample data were in excellent condition.

Listing Details

Pollutant

Unknown Pollutant

Listed For

Fish and Aquatic Life

Impairments

Elevated Water Temperature

Current Use

Coldwater - stocked, reproduction

Listing Status

303d Listed

Attainable Use

Coldwater - stocked, reproduction

Priority

Low

Designated Use

Coldwater - stocked, reproduction

303(d) ID

2016-126

Listing Date

4/1/2016

Impaired Water Notes

This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.

Date

8/29/2015

Impaired Water Notes

This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.

Date

4/12/2017

Pollutant

Total Phosphorus

Listed For

Fish and Aquatic Life

Impairments

Impairment Unknown

Current Use

Coldwater - stocked, reproduction

Listing Status

303d Listed

Attainable Use

Coldwater - stocked, reproduction

Priority

Low

Designated Use

Coldwater - stocked, reproduction

303(d) ID

2016-125

Listing Date

4/1/2016

Impaired Water Notes

This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category).

Date

8/29/2015

Pollutant

Sediment/Total Suspended Solids

Listed For

Fish and Aquatic Life

Impairments

Degraded Habitat

Current Use

Coldwater - stocked, reproduction

Listing Status

TMDL Approved

Attainable Use

Coldwater - stocked, reproduction

Priority

Not Applicable

Designated Use

Coldwater - stocked, reproduction

303(d) ID

243

Listing Date

4/1/1998

Impaired Water Notes

The Wisconsin Department of Natural Resources (WDNR)
placed the entire length of Little Willow Creek on the state’s 303(d) impaired waters list
in 1996 as high priority due to degraded habitat caused by excessive sedimentation
(Table 1). The Clean Water Act and US EPA regulations require that each state develop
TMDLs for waters on the Section 303(d) list.

Date

5/4/2011

Impaired Water Notes

The sediment TMDL for Little Willow Creek was approved by USEPA September 9, 2008.

Date

9/9/2008

The Official Internet site for the Wisconsin Department of Natural Resources